Python字符串对象详解(2)

class str(basestring):
"""String object."""

def __init__(self, object=''):
"""Construct an immutable string.#构造一个不可变的字符串,初始化对象使用

:type object: object
"""
pass

def __add__(self, y):
"""The concatenation of x and y.#连接x和y  x,y均为字符串类型

:type y: string
:rtype: string
"""
return b''

def __mul__(self, n):
"""n shallow copies of x concatenated.#n浅层副本x连接。就是字符串的n倍出现连接

:type n: numbers.Integral
:rtype: str
"""
return b''

def __mod__(self, y): #求余
"""x % y.

:rtype: string
"""
return b''

def __rmul__(self, n):
"""n shallow copies of x concatenated.#n浅层副本x连接。就是字符串的n倍出现连接

:type n: numbers.Integral
:rtype: str
"""
return b''

def __getitem__(self, y):
"""y-th item of x, origin 0.  #实现类似slice的切片功能

:type y: numbers.Integral
:rtype: str
"""
return b''

def __iter__(self):      #迭代器
"""Iterator over bytes.

:rtype: collections.Iterator[str]
"""
return []

def capitalize(self):
"""Return a copy of the string with its first character capitalized  #实现首字母大写
and the rest lowercased.

:rtype: str
"""
return b''

def center(self, width, fillchar=' '):  #中间对齐
"""Return centered in a string of length width.

:type width: numbers.Integral
:type fillchar: str
:rtype: str
"""
return b''

def count(self, sub, start=None, end=None): #计算字符在字符串中出现的次数
"""Return the number of non-overlapping occurrences of substring
sub in the range [start, end].

:type sub: string
:type start: numbers.Integral | None
:type end: numbers.Integral | None
:rtype: int
"""
return 0

def decode(self, encoding='utf-8', errors='strict'): #把字符串转成Unicode对象
"""Return a string decoded from the given bytes.

:type encoding: string
:type errors: string
:rtype: unicode
"""
return ''

def encode(self, encoding='utf-8', errors='strict'):#转换成指定编码的字符串对象
"""Return an encoded version of the string as a bytes object.

:type encoding: string
:type errors: string
:rtype: str
"""
return b''

def endswith(self, suffix, start=None, end=None):#是否已xx结尾
"""Return True if the string ends with the specified suffix,
otherwise return False.

:type suffix: string | tuple
:type start: numbers.Integral | None
:type end: numbers.Integral | None
:rtype: bool
"""
return False

def find(self, sub, start=None, end=None):#字符串的查找
"""Return the lowest index in the string where substring sub is
found, such that sub is contained in the slice s[start:end].

:type sub: string
:type start: numbers.Integral | None
:type end: numbers.Integral | none
:rtype: int
"""
return 0

def format(self, *args, **kwargs):#格式化字符串
"""Perform a string formatting operation.

:rtype: string
"""
return ''

def index(self, sub, start=None, end=None):#查找字符串里子字符第一次出现的位置
"""Like find(), but raise ValueError when the substring is not
found.

:type sub: string
:type start: numbers.Integral | None
:type end: numbers.Integral | none
:rtype: int
"""
return 0

def isalnum(self):#是否全是字母和数字
"""Return true if all characters in the string are alphanumeric and
there is at least one character, false otherwise.

:rtype: bool
"""
return False

def isalpha(self):#是否全是字母
"""Return true if all characters in the string are alphabetic and there
is at least one character, false otherwise.

:rtype: bool
"""
return False

def isdigit(self):#是否全是数字
"""Return true if all characters in the string are digits and there
is at least one character, false otherwise.

:rtype: bool
"""
return False

def islower(self):#字符串中的字母是否全是小写
"""Return true if all cased characters in the string are lowercase
and there is at least one cased character, false otherwise.

:rtype: bool
"""
return False

def isspace(self):#是否全是空白字符
"""Return true if there are only whitespace characters in the
string and there is at least one character, false otherwise.

:rtype: bool
"""
return False

def istitle(self):#是否首字母大写
"""Return true if the string is a titlecased string and there is at
least one character, for example uppercase characters may only
follow uncased characters and lowercase characters only cased ones.

:rtype: bool
"""
return False

def isupper(self):#字符串中的字母是都大写
"""Return true if all cased characters in the string are uppercase
and there is at least one cased character, false otherwise.

:rtype: bool
"""
return False

def join(self, iterable):#字符串的连接
"""Return a string which is the concatenation of the strings in the
iterable.

:type iterable: collections.Iterable[string]
:rtype: string
"""
return ''

def ljust(self, width, fillchar=' '):#输出字符左对齐
"""Return the string left justified in a string of length width.
Padding is done using the specified fillchar (default is a space).

:type width: numbers.Integral
:type fillchar: str
:rtype: str
"""
return b''

def lower(self):#字符中的字母是否全是小写
"""Return a copy of the string with all the cased characters
converted to lowercase.

:rtype: str
"""
return b''

def lstrip(self, chars=None):#取出空格及特殊字符
"""Return a copy of the string with leading characters removed.

:type chars: string | None
:rtype: str
"""
return b''

def partition(self, sep):#字符串拆分 默认拆成三部分
"""Split the string at the first occurrence of sep, and return a
3-tuple containing the part before the separator, the separator
itself, and the part after the separator.

:type sep: string
:rtype: (str, str, str)
"""
return b'', b'', b''

def replace(self, old, new, count=-1):#字符串替换
"""Return a copy of the string with all occurrences of substring
old replaced by new.

:type old: string
:type new: string
:type count: numbers.Integral
:rtype: string
"""
return ''

def rfind(self, sub, start=None, end=None):#右侧查找  第一次出现
"""Return the highest index in the string where substring sub is
found, such that sub is contained within s[start:end].

:type sub: string
:type start: numbers.Integral | None
:type end: numbers.Integral | none
:rtype: int
"""
return 0

def rindex(self, sub, start=None, end=None):##右侧查找  第一次出现位置

"""Like rfind(), but raise ValueError when the substring is not
found.

:type sub: string
:type start: numbers.Integral | None
:type end: numbers.Integral | none
:rtype: int
"""
return 0

def rjust(self, width, fillchar=' '):#右对齐
"""Return the string right justified in a string of length width.
Padding is done using the specified fillchar (default is a space).

:type width: numbers.Integral
:type fillchar: string
:rtype: string
"""
return ''

def rpartition(self, sep):#从右侧拆分
"""Split the string at the last occurrence of sep, and return a
3-tuple containing the part before the separator, the separator
itself, and the part after the separator.

:type sep: string
:rtype: (str, str, str)
"""
return b'', b'', b''

def rsplit(self, sep=None, maxsplit=-1):#字符串的分割
"""Return a list of the words in the string, using sep as the
delimiter string.

:type sep: string | None
:type maxsplit: numbers.Integral
:rtype: list[str]
"""
return []

def rstrip(self, chars=None):#去掉字符串的右侧空格
"""Return a copy of the string with trailing characters removed.

:type chars: string | None
:rtype: str
"""
return b''

def split(self, sep=None, maxsplit=-1):#字符串的切割
"""Return a list of the words in the string, using sep as the
delimiter string.

:type sep: string | None
:type maxsplit: numbers.Integral
:rtype: list[str]
"""
return []

def splitlines(self, keepends=False):#把字符串按照行切割成list
"""Return a list of the lines in the string, breaking at line
boundaries.

:type keepends: bool
:rtype: list[str]
"""
return []

def startswith(self, prefix, start=None, end=None):#以xx开头
"""Return True if string starts with the prefix, otherwise return
False.

:type prefix: string | tuple
:type start: numbers.Integral | None
:type end: numbers.Integral | None
:rtype: bool
"""
return False

def strip(self, chars=None):#去除左右空格
"""Return a copy of the string with the leading and trailing
characters removed.

:type chars: string | None
:rtype: str
"""
return b''

def swapcase(self):#大小写互换
"""Return a copy of the string with uppercase characters converted
to lowercase and vice versa.

:rtype: str
"""
return b''

def title(self):#标题化字符串
"""Return a titlecased version of the string where words start with
an uppercase character and the remaining characters are lowercase.

:rtype: str
"""
return b''

def upper(self):#大写
"""Return a copy of the string with all the cased characters
converted to uppercase.

:rtype: str
"""
return b''

def zfill(self, width):#变成特定长度，不足0补齐
"""Return the numeric string left filled with zeros in a string of
length width.

:type width: numbers.Integral
:rtype: str
"""
return b''

以上是字符串类中的所有方法包含特殊方法。翻译不够准确，请谅解

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